Matter and Energy 21 



5. What material have you seen in more than one state of matter? 



6. What are properties of matter? 



7. Name two general properties of three objects in the classroom. 



8. Name special properties of each of three objects in your home. 



9. Complete the following statements: 



(a) Wood is a good building material because of its property of . 



(b) Steel is used for rails and bridges because of its property of . 



(c).I look for the property of in a good dress material. 



10. What is the law of conservation of matter? 



11. Define inertia. 



12. Why is it hard to stand in the aisle of a trolley, without support, when 

 it rounds a sharp curve? 



13. Define (a) gravitation; (b) gravity. 



14. How much would a ten-pound iron ball weigh if there were no gravity? 



15. What is energy? 



16. With your hand, illustrate the energy of motion. 



17. Name another form of energy your body illustrates. 



18. What forms of energy are illustrated by an automobile? 



19. Explain the law of the conservation of energy, giving an illustration 

 from common things about you. 



20. What is the source of all energy? 



21. What forms of the sun's energy do we notice every day? 



PROJECTS 



1. Perform an experiment of your own to illustrate a physical change 

 of matter. 



2. List, with a proper heading, ten examples of the effects produced in 

 your own home by different forms of energy. 



OUTDOOR OBSERVATION 



1. Observe and list forms of energy noted on your way to and from school. 



2. Observe and list five kinds of matter, and name several properties of 

 each kind. 



REFERENCES 



Introductory Physics Higgins 



Everyday Chemistry Vivian 



The Conservation of Energy Stewart 



